Shapiro effect

On Dec 11, 5:40*am, Tom Roberts wrote in
sci.physics.relativity:
On 12/10/11 12/10/11 * 7:50 PM, waitedavidmsphysics wrote:

[Shapiro delay near superior conjunction]
Newtonian gravity predicts the wrong sign completely expecting an early time
of arrival for the light instead of a delay.

That is an interesting, and in retrospect, obvious, observation. I have never
seen this mentioned before. While it is not obvious how to combine Newtonian
gravitation with either classical electrodynamics or the wave optics
approximation to it, any particulate model of light combined with Newtonian
gravitation would indeed predict an early arrival time, in direct conflict with
observations.

Bravo, Honest Roberts! Newton's emission theory of light just died for
the second time and will never recover! It also definitively died some
time ago when you discovered that, even if "light in vacuum does not
travel at the invariant speed of the Lorentz transform", Divine
Albert's Divine Special Relativity "would be unaffected" and "today's
foundations of modern physics would not be threatened":

http://groups.google.ca/group/sci.ph...1ebdf49c012de2
Tom Roberts: "If it is ultimately discovered that the photon has a
nonzero mass (i.e. light in vacuum does not travel at the invariant
speed of the Lorentz transform), SR would be unaffected but both
Maxwell's equations and QED would be refuted (or rather, their domains
of applicability would be reduced)."

http://groups.google.com/group/sci.p...d3ebf3b94d89ad
Tom Roberts: "As I said before, Special Relativity would not be
affected by a non-zero photon mass, as Einstein's second postulate is
not required in a modern derivation (using group theory one obtains
three related theories, two of which are solidly refuted
experimentally and the third is SR). So today's foundations of modern
physics would not be threatened."

Pentcho Valev